A series of borophosphate K(Na)BaBP₂O₈:Eu²⁺ phosphors were synthesize d via high-temperature reaction.The influences of firing temperature,K⁺ partially substituted by Na + on crystal structure and luminescent properties are investigated.The preparing temperature was determin ed and the phosphors were characterized by thermogravimetric-differential scanning calorimetry (TG-DSC), X-ray diffraction (XRD), fluorescence spectrophotometer (PL) and chromaticity coordinates.The resu lts indicate that the KBaBP₂O₈:Eu²⁺ phosphors synthesized at 800－875℃ firing temperat ure have KBaBP₂O_8purity phase. K(Na)BaBP₂O₈:Eu²⁺ phosphors could be efficiently excited by the near- ultraviolet InGaN (350－410nm) chips, and show a broad and asymmetry emission band in 400－650nm at excitation of 365nm,and the emission peak at about 456nm is corresponding to the 4f^65d1-4f⁷-5d ⁰ transition of the Eu²⁺.The crystallographic sites of Eu²⁺ in KBaBP₂O_8are calculated by van Uitert formula.The emission in tensity could be increased by partially substituting K⁺ by Na⁺,and the optimum mole ratio is Na/K=0.35/0.65.The sa mples maintain single phase after partially substituting K＋ by Na⁺,but the diffraction peaks of the se samples shift slightly towards to the higher 2θ angle.The color coordinates of K(Na)BaBP₂O₈:Eu²⁺ phosphors could b e changed from blue to blue-white region and they may have flexible applicatio ns for near -UV LEDs.